A think you left a really of your answer. Shouldn't that read?
Really, really, really little.
Only kidding. Look at it this way, someone with an Agway garden tractor is going to see them as really, really, really big tires.
By the way, here's a tip if you folks want to know if a garden tractor has any 'beef'.
Look at the rear tires if they are bolted to a hub they're made to do something. If they're keyed to a shaft don't expect more than a mower with a seat.
Cars are a little harder to figure out. I had this friend Eddie when I was growing up who thought his father's Pontiac station wagon was "hot". He took it up to Dover Drag strip and got beat into the ground. Not happy Eddie decided to ‘boost’ his chances by throwing a little nitro methane into the tank. It ran like a bat out of h*ll and he almost won his class ( he got beat by a bigger cheater who switched the 326 in his Tempest with one from a 389 GTO. Same blocks).
Eddie, the little achiever he was, kept running it on nitro until he finally beat someone a few weeks later.
Anyway a couple of months go by and Eddie's dad is at the dealer raising h*ll because the valves are burnt to a crisp on his new wagon with 1500 miles on it and it runs like piss.
The dealer, wishing to keep a solid customer who bought a new car every third year, replaced the engine.
Good old Eddie was back at Dover next week to break that new engine in just right.